Expansion-drum for hoisting apparatus.



No. 060,059. PATENTED JULY za, 11907. i0. w. museum, 0 1. A.11011111011.

'EXPANSION DRUM POR HOISTING APPARATUS.

APPLIOATIUN FILED 013.12, 1907. v

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UNITED STATES PATENT OFFICE.,

DANIEL W. DRISCOLL AND JOHN A. RENNIEE, OF NEW YORK, N. Y.

EXPANSION-DRUM FOR HOISTING APPARATUS.

Specification of Letters Patent.

Patented Jury 23, 1907.

Application filed February 12,1907. Serial No. 356,977.

To all whom it may concern:

Be it known that we, DANIEL W. DnisooLL and .Toi-IN A. RENNIEE, citizensof the United States, and residing at New York, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Expansion Drums for I-Ioisting Apparatus, of which thefollowing is a specification, such as will enable' those skilled in theart to which it appertains to make and use the same.

This invention relates to hoisting apparatus, and the object thereof isto provide an expansion drum for use in hoisting apparatus of variouskinds and classes and with which is employed a cable one end of which isconnected, in practice, with an article or device to be raised, orraised and lowered, the construction and operation of the drum -beingsuch that the diameter thereof is increased or decreased at eachrevolution thereof so as to increase or decrease the amount of cablewound thereon according to the direction in which the drum is turned.

Our improvement may be applied to elevators, cranes, or other kinds orclasses of machinery designed for lifting, or lifting and lowering, aload of any kind and is fully disclosed in the following specification,of which the accompanying drawing forms a part, in which the separateparts of our improvement are designated by suitable reference charactersin each of the views, and in which Figure l is a side view of ourimproved expansion drum device; Fig. 2 a transverse vertical sectionthereof; and, Fig. 3 a partial section on the line 3-3 of Fig. l.

In the practice of our invention as shown in the drawing, we provide asuitable frame a having side members provided with radially arrangedarms or supports a2, four of which are employed in the constructionshown, and the radially arranged arms or supports a2 are provided withlongitudinal slots a3 and in the outer sides of said arms or supportsare grooves a* in which are mounted slides b provided with projecting.

lugs or fingers b2. The radial arms or supports a2 are arranged in pairsopposite each other, and mounted in the opposite slides b are shafts c,four of which are employed in the construction shown, and the shafts care provided with sheaves c2 which fill the space between r the sidemembers of the frame a but only part of which are shown in the drawing.A shaft d passes centrally through the frame a, in the form ofconstruction shown, and the shafts c are arranged concentrically aroundsaid shaft d, and the shaft d is provided at its opposite ends andoutside of the side members of the frame a with disks e, the inner sidesof which are provided with spiral ribs el in connection with which theoutwardly directed lugs or fingers b` operate as clearly shown in Fig.2. The shaft cl is also provided, in the form of construction shown,with a large gear wheel J" which is secured to one end thereof andgeared in connection therewith is a smaller gear wheel or pinion dmounted on a power shaft d* which may be' turned or driven in anydesired manner.

Secured to the bottom of the main frame or to any other stationarysupport adjacent thereto is a cable f, said cable being secured to thebottom of the left hand side of the frame a, in the construction shown,and said cable is successively passed around all the sheaves eZ on theshafts c from the left hand end of said shafts to the right hand endthereof, from which point it is carried out through the main frame andpassed around a pulley g supported at one side of the main frame andfrom which it may be carried up and connected with an elevator or anyother device or article to be hoisted, or hoisted and lowered, thisoperation being similar to that of connecting the hoisting cable with anelevator, if the device is used in connection with an elevator, or withany other article or device to be raised and lowered in any kind orclass of a hoisting, or hoisting and lowering, machine.

The shafts c with the sheaves c2 mounted thereon form the drum of theapparatus and when the shaft d is turned in one direction the saidshafts c will be gradually forced outwardly by the operation of theprojecting`lugs or fingers b2 in connection with the spiral ribs eL onthe disks e, and when said shaft is turned in the other direction thisoperation will be reversed and the shafts c will move inwardly.

In order to accomplish the proper winding of the cable f on the sheavesc2 of the shafts c, one of said shafts is mounted at an inclination orangle to the shaft d, as clearly indicated in 'dotted lines at c4 inFig. 2, and as shown in Fig. 3, and in supporting the ends of the shaftd we provide blocks c5 having parts c( which pass through the slots a inthe radial arms or supports a2 and are connected with the slides b allas clearly shown in Fig. 3. The shafts c and sheaves c2 mounted thereonform, as hereinbefore stated, the expansion drum of the apparatus, andin the operation of said apparatus these shafts may be gradually forcedoutwardly so as to eX- pand the diameter of the drum or be drawninwardly so as to contract said diameter. Our invention is not limitedto any particular means for accomplishing this result, the shaft d, thedisks e provided with the spiral ribs e2 and the slides b operating inconnection with said ribs and with which the shafts c are connectedbeing simply shown as one means by which the aforesaid result may beaccomplished.

It will also be apparent that the shaft d, in the form of constructionshown, may be operated or turned by any desired means, device or powermechanism.

Having fully described our invention, what we claim as new and desire tosecure by Letters Patent, isz- 1.- ln a hoisting apparatus, a drumcomprising a frame provided with a plurality of parallel shafts mountedconcentrically around a common center, a plurality of sheaves mounted oneach of said shafts, a hoisting cable Wound around all of said shaftsand on the pulleys mounted thereon, and means for movingr said shaftsradially when the hoisting apparatus is in use.

2. In a hoisting apparatus, a frame the opposite sides of which areprovided with radial guides, parallel drum shafts mounted in said guidesand coneentrically around a common center and provided with sheaves, ahoisting cable wound around said shaft and on said sheaves, and meansfor moving said shafts radially when the hoisting apparatus is in use.

In a hoisting apparatus, a drum comprising' a frame, a plurality ofparallel shafts mounted concentrically around a common center in saidframe and movable radially of said frame while retaining a parallelposition, each of said shafts being also provided with a plurality ofsheaves, and means Afor moving said shafts radially when the hoistingapparatus is in use.

4. In an apparatus. of the class described, a frame, the opposite sidesof which are provided with radial slots or openings, drum shafts mountedin said slots or openings and provided Awith sheaves, and means formoving said shalts radially in said slots or openings, comprising acentral shaft provided at its opposite ends with disks having spiralribs on their inner sides, and slides mounted in said frame and withwhich said shafts are connected and provided with projecting `memberswhich operate in connection with said ribs.

5. In an. apparatus of thevclass described, a frame, the opposite sidesof which are provided with radial slots or openings, drum shafts mountedin said slots or openings and provided with sheaves, and means formoving said shafts radially in said slots or openings, comprising acentral shaft provided at its opposite ends with disks having spiralribs on their inner sides, and slides mounted in said frame and withwhich said shafts are connected and provided with projecting memberswhich operate in connection with said ribs, one of saiddrum shafts beingmounted at an angle to the central shaft,

In testimony that We claim the foregoing as our invention We have signedour names in presence of the subscribing witnesses this 9th day ofFebruary 1907.

DANIEL W. DRISCOLL. JOHN A. RENNIEE. Witnesses t C. E. ll/IULREANY, A.WORDEN Gines.

